chromium/third_party/blink/web_tests/external/wpt/fenced-frame/resources/fence-api-inner.https.html

<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="utils.js"></script>
<title>Fenced frame content to test window.fence object</title>

<body>
<script>

  // Get the token for communication with the parent.
  const [fence_api_token] = parseKeylist();

  // Check that window.fence is visible inside fenced frames.
  assert_true(window.fence != null,
              "window.fence should be visible inside fenced frames");
  assert_true(fence != null,
              "fence should be visible inside fenced frames");

  // Tell the parent that the test succeeded.
  writeValueToServer(fence_api_token, "");

</script>
</body>